package com.candy.blog.util;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

/**
 * @version 1.0
 * @author: 南风
 * @description md5工具类
 * @date: 2022/2/4 16:27
 */
public class MD5Utils {
    public static String code(String str) {
        try {
            MessageDigest md = MessageDigest.getInstance("MD5");
            md.update(str.getBytes());
            byte[] byteDigest = md.digest();
            int i;
            StringBuffer buffer = new StringBuffer("");
            for (int offset = 0; offset < byteDigest.length; offset++) {
                i = byteDigest[offset];
                if (i < 0) {
                    i += 256;
                }

                if (i < 16) {
                    buffer.append("0");
                }
                buffer.append(Integer.toHexString(i));
            }
            // 32位加密
            return buffer.toString();
            // 16位的加密
//            return buffer.toString().substring(8,24);
        }catch (NoSuchAlgorithmException e){
            e.printStackTrace();
            return  null;
        }
    }

    public static void main(String[] args) {
        System.out.println(code("nanfeng"));
    }
}

